Kim Kardashian to OPI Nail Polish -- My Sisters Deserve Equal Pay

Kim K to OPI Nail Polish

My Sisters Deserve Equal Pay

12/6/2011 4:00 AM PST BY TMZ STAFF

All Kardashian women may not be created equal ... but one of the biggest nail polish companies on the planet is sure paying them like they are ... and get this -- even the half-sisters are raking in BIG MONEY.

TMZ has learned ... all 6 K-ladies (Kris, Kim, Kourtney, Khloe, Kylie and Kendall) inked a deal with OPI back in March to become spokeswomen for a Kardashian line of nail polish ... featuring colors like: